brochuresuuperfiltramics mis jour le 13032013 · 2013. 3. 14. · title: brochuresuuperfiltramics...
TRANSCRIPT
- 1 -
CTI
SUPERFILTRAMICS
Céramiques Techniques Industrielles sas 382, Avenue du Moulinas - La Resclause - 30340 Salindres - France
Phone : +33 (0) 466 858 870 Fax : +33 (0) 466 857 009 e-mail : [email protected] Website : www.ctisa.fr
- 2 -
Dear Madam, Dear Sir, The Céramiques Techniques et Industrielles S.A. company (C.T.I.) has set up in Salindres, in the Gard near Alès, a large production facility and an industrial research unit more than 64,000 sq. ft. C.T.I. is specialized in perfecting the design of technical ceramics often porous, whose applications are
mainly in environment, filtration, catalysis fields and SOFC.
These include:
� Filtration of liquids: membrane’s carriers in micro, ultra filtration. � Diesel Particulate filter (SiC patented) � Gas and particle’s filtration : tubular, flat, honeycomb filtration’s carrier � Catalyst’s carriers : granulated with high specific area, honeycomb, smooth and grooved
porous rings � Filtration of liquid metals : honeycomb refractories � Special refractories : withstanding temperatures higher than 1 600°C � Special ceramics
C.T.I. has a 6,000 sq. ft industrial line as well as a 3,000 sq. ft of laboratories and research line dedicated
to the design and pre-production of technical ceramics. The research line, including mixers, presses,
extruders, cell and H.F. driers, 1 700°C kilns, temperature and humidity controlled room, etc…, is designed
for perfecting specific new products. This line is an efficient backsupport for many research centers.
Deriving its strength from long experience and a stable industrial team, C.T.I. remains a link between
university research and mass productions.
Our engineers and technicians are at your disposal.
Yours sincerely.
The Chairman François Garcia
SAS Capital 220 000 euros Siège social 30340 SALINDRES R.C.S. Nîmes B 377554506 SIRET 377554506 00032 2
- 3 -
THE CURE
FILTRATION
Dross is an inevitable phenomenon when mixing and pouring foundry alloys. Unless it can be kept out, this dross gets carried into the mould, to cause inclusion faults which affect the component’s quality. These are various types of inclusion: sand grains from moulds or cores, bits of slag, particles of refractory material from furnace or ladle, dirt from the crucible… According to the type of metal, these are also : � Non ferrous alloys: oxide particles
or flakes (from aluminium or magnesium skin), traces of flux, chlorides, nitrides, boron…
� Lamellar or spheroidal graphite
iron: pieces of inoculant or iron
alloy not completed absorbed by the metal, magnesium slag particles…
� Steels : ceroxydes and traces of de-
oxidising material, de-sulphurising and de-phosphorising slag.
All these inclusions affect castings in a number of ways:
� Reduced mechanical properties, � Worse machineability, � Loss of proofness in parts subject to
pressure testing, � Surface defects which inhibit surface
treatment, � Poor surface appearance, � Reduced corrosion resistance.
In the car industry for example, where “zero defect” standards are now the rule, these faults usually result in the reject components or, at best, re-working them at the foundry’s expense.
- 4 -
A FOUNDRY PROBLEM
HOW TO ELIMINATE DROSS
Metal filtration is the surest way of retaining dross ; before it reaches the mould and causes defects. Filtering :
� Reduces reject rates considerably,
� Saves re-work costs
� Improves the structures of castings,
� Enhances their mechanical properties, improves machineability
� Improve surface condition,
� Reduce yield loss,
� Improves corrosion resistance,
� Eliminates risks of leakage in parts which are pressure tested,
� Limits machining allowances, particularly with steel components.
- 5 -
SUPERFILTRAMICS
CTI’S FILTERS
CTI offers a large range of filters which are specially suited to casting alloys : SUPERFILTRAMICS, a multicellular filter produced by extrusion by CTI team. Using high performance ceramic materials, some operating at 1 650 deg-C, SUPERFILTRAMICS filters meet the needs of filtering all aluminium and copper’ alloys, cast irons, super alloys, and even some special steels. Their effect is not mechanical, because they also filter by
means of a physico-chemical reaction with the wall surface.
In this way, they retain dross particles which are much smaller than the size of each cell. Futhermore, the filter effect takes place with only a slight reduction in the pouring system’s flow rate. Finally SUPERFILTRAMICS’s cellular structure, being produced by extrusion, ensures perfect reproducibility.
- 6 -
INSERTION
SIMPLE AND QUICK
Wether placed horizontally, vertically or at a slight angle in the pouring system, SUPERFILTRAMICS’s effectiveness remains constant. However, experience shows that, according to the alloy, certain positions are recommended to ensure good feed to the components : � The methods “Tilted, bottom-to-
top” (fig 1*) and “Tilted ; top-to-bottom”
(fig 2*) are suitable for all ferrous and non-ferrous alloys. � The vertical position (fig 3*) is
better for special steels and SG irons, � The horizontal position (fig 4*) is
used only for irons which are inoculated in the mould. *See following pages.
- 7 -
INSERTION
SIMPLE AND QUICK
Figure 1 – Titled position (bottom-to-top) C.T.I.F. method
- 8 -
INSERTION
SIMPLE AND QUICK
- 9 -
SUPERFILTRAMICS®
ZIRCONIA - MULLITE
REF
DIMENSIONS
MESH CROSS-SECTION THICKNESS
Inches
mm
Inches +
0.02
mm
+ 0.5
cpsi
81034 ZM 1.92 X 1.92 + 0.04 48.8 X 48.8 + 1 0.50 12.70 400
1.92 X 1.92 + 0.04 48.8 X 48.8 + 1 0.50 12.70 280
82001 ZM Ǿ 4.11 + 0.06 Ǿ 81.0 + 1 0.50 12.70 400
82008 ZM Ǿ 4.11 + 0.06 Ǿ 104.4 + 1.5 0.75 19.05 400
82006 ZM Ǿ 4.11 + 0.06 Ǿ 104.4 + 1.5 1.00 25.40 400
- 10 -
SUPERFILTRAMICS
ZIRCONIA-MULLITE
DESCRIPTION Honeycomb filters available size 400 - 280 CPSI
cut after sintering
DIMENSIONS Round and square filters in many dimensions and thickness
(Consult our reference list)
TYPICAL PROPERTIES *
CHEMICAL Content Unit Value Pure Mullite
weight % 71.4 ZrO2
weight % 28.0
Na2O + K2O
weight % < 0.3
Other impurities
weight % < 0.3
Crystalline structure
ZrO2
monoclinic + mullite
PHYSICAL Frontal porosity %. > 63
Bulk density g/cm3 2.70 ± 0.2 Theoritical density
g/cm3 3.60
THERMAL Coefficient of thermal expansion 20 - 500 °C 10-6/ °C 5.2
20-1000 °C 10-6/ °C 5.6
20-1400 °C 10-6/ °C 5.9
MECHANICAL Mechanical strength 20 °C daN >50 Maximum working temperature in air °C 1650 in inert atm °C 1650
VISUAL CONTROL Acute visual control under magnifying glass
- 11 -
SUPERFILTRAMICS®
ZIRCONIA - MULLITE
DESCRIPTION
4.11” round ceramic honeycomb filter 400 M Name SUPERFILTRAMIC Code 82001 ZM / 82006 ZM / 82008 ZM Composition zirconia – mullite
Firing’s temperature 1600° C in the center of burden
1650°C temperature control ring (Philips)
DIMENSIONAL REQUIREMENTS
Cell opening 0.039” X 0.039” + 0.003” Cell Wall 0.012” + 0.003” Skin thickness 0.021” + 0.003” Size 4.11” + 0.06” Thickness 0.5” – 0.75” – 1” (as requiered) + 0.02” Camber 0.012” maximum
VISUAL REQUIREMENTS
Missing cell walls < 1 per filter Cracked cell walls < 3 per filter Surface debris none Distorted or blocked cells < 3 per filter Cracks in skin-filter 1 Circumference (max)
PACKAGING REQUIREMENTS
This material is packaged in a manner to prevent breakage, or contamination during shipping handling and storage.
- 12 -
SUPERFILTRAMICS®
ZIRCONIA - MULLITE
DESCRIPTION
1.92” X 1.92” , square ceramic honeycomb filter 400 M Name SUPERFILTRAMIC Code 81034 ZM Composition zirconia – mullite
Firing’s temperature 1600° C in the center of burden
1650°C temperature control ring (Philips)
DIMENSIONAL REQUIREMENTS
Cell opening 0.039” X 0.039” + 0.003” Cell Wall 0.012” + 0.003” Skin thickness 0.021” + 0.003” Size 1.92” X 1.92” + 0.04” Thickness Nominal + 0.02” Camber 0.012” maximum
VISUAL REQUIREMENTS
Missing cell walls < 1 per filter Cracked cell walls < 3 per filter Surface debris none Distorted or blocked cells < 3 per filter Cracks in skin-filter 1 Circumference (max)
PACKAGING REQUIREMENTS
This material is packaged in a manner to prevent breakage, or contamination during shipping, handling and storage.